Not that this would be 3D, but I think in 6th grade we designed stained glass windows using the various shapes. You take two pieces of black paper and cut out a design (a mandala like design works best) something graphic... then, you take an overhead sheet and put it between the two. Color on the overhead with sharpies and it will look like stained glass. You can also use cut tissue paper between the two layers, which also looks very pretty.

They could use protractors to cut shapes with certain angles to them, and compasses to make circles in three sizes or something. then, with the shapes they make, they create a design or pattern. A radiating pattern from the origin of the circle. The only thing is an exacto knife really works best for this... I don't know how you feel about that.

hey well maybe in stead of just gathering data you can create an exebit . try taking a card board box and make little house take another one and make an even biger one. see how many people like it and .record it and their you go your project!!!!!!!!!!!

Tessellations are always fun. My three favourites are salamanders, dogs and birds. We make the patterns for them, then they trace them onto a large sheet of paper. They colour them whatever way they wish. Some kids are very creative and the final product is very very good. If I knew how to put the patterns onto my computer I could post them.

find area and perimeter of all the rooms in the house, find the area and perimeter of the entire house. Some students created circles for hot tubs and patio areas so they had to find circumference also. works great and they enjoy it.